org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators
Class POCast

java.lang.Object
  extended by org.apache.pig.impl.plan.Operator<PhyPlanVisitor>
      extended by org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator
          extended by org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.ExpressionOperator
              extended by org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POCast
All Implemented Interfaces:
Serializable, Cloneable, Comparable<Operator>, Illustrable

public class POCast
extends ExpressionOperator

This is just a cast that converts DataByteArray into either String or Integer. Just added it for testing the POUnion. Need the full operator implementation.

See Also:
Serialized Form

Field Summary
 
Fields inherited from class org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator
alias, dummyBag, dummyBool, dummyDBA, dummyDouble, dummyFloat, dummyInt, dummyLong, dummyMap, dummyString, dummyTuple, illustrator, input, inputAttached, inputs, lineageTracer, outputs, parentPlan, pigLogger, reporter, requestedParallelism, res, resultType
 
Fields inherited from class org.apache.pig.impl.plan.Operator
mKey
 
Constructor Summary
POCast(OperatorKey k)
           
POCast(OperatorKey k, int rp)
           
 
Method Summary
 POCast clone()
          Make a deep copy of this operator.
 List<ExpressionOperator> getChildExpressions()
          Get child expression of this expression
 FuncSpec getFuncSpec()
           
 Result getNext(Boolean b)
           
 Result getNext(DataBag bag)
           
 Result getNext(DataByteArray dba)
           
 Result getNext(Double d)
           
 Result getNext(Float f)
           
 Result getNext(Integer i)
           
 Result getNext(Long l)
           
 Result getNext(Map m)
           
 Result getNext(String str)
           
 Result getNext(Tuple t)
           
 Tuple illustratorMarkup(Object in, Object out, int eqClassIndex)
          input tuple mark up to be illustrate-able
 String name()
           
 void setFieldSchema(ResourceSchema.ResourceFieldSchema s)
           
 void setFuncSpec(FuncSpec lf)
           
 boolean supportsMultipleInputs()
          Indicates whether this operator supports multiple inputs.
 void visit(PhyPlanVisitor v)
          Visit this node with the provided visitor.
 
Methods inherited from class org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.ExpressionOperator
accumChild, accumChild, accumChild, accumChild, accumChild, accumChild, accumChild, accumChild, accumChild, accumChild, accumChild, containUDF, setIllustrator, supportsMultipleOutputs
 
Methods inherited from class org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator
attachInput, cloneHelper, detachInput, getAlias, getAliasString, getDummy, getIllustrator, getInputs, getLogger, getNext, getPigLogger, getRequestedParallelism, getResultType, isAccumStarted, isAccumulative, isBlocking, isInputAttached, processInput, reset, setAccumEnd, setAccumStart, setAccumulative, setAlias, setInputs, setParentPlan, setPigLogger, setReporter, setRequestedParallelism, setResultType
 
Methods inherited from class org.apache.pig.impl.plan.Operator
compareTo, equals, getOperatorKey, getProjectionMap, hashCode, regenerateProjectionMap, rewire, toString, unsetProjectionMap
 
Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait
 

Constructor Detail

POCast

public POCast(OperatorKey k)

POCast

public POCast(OperatorKey k,
              int rp)
Method Detail

setFuncSpec

public void setFuncSpec(FuncSpec lf)
                 throws IOException
Throws:
IOException

visit

public void visit(PhyPlanVisitor v)
           throws VisitorException
Description copied from class: Operator
Visit this node with the provided visitor. This should only be called by the visitor class itself, never directly.

Specified by:
visit in class ExpressionOperator
Parameters:
v - Visitor to visit with.
Throws:
VisitorException - if the visitor has a problem.

name

public String name()
Specified by:
name in class Operator<PhyPlanVisitor>

supportsMultipleInputs

public boolean supportsMultipleInputs()
Description copied from class: Operator
Indicates whether this operator supports multiple inputs.

Specified by:
supportsMultipleInputs in class Operator<PhyPlanVisitor>
Returns:
true if it does, otherwise false.

getNext

public Result getNext(Boolean b)
               throws ExecException
Overrides:
getNext in class PhysicalOperator
Throws:
ExecException

getNext

public Result getNext(Integer i)
               throws ExecException
Overrides:
getNext in class PhysicalOperator
Throws:
ExecException

getNext

public Result getNext(Long l)
               throws ExecException
Overrides:
getNext in class PhysicalOperator
Throws:
ExecException

getNext

public Result getNext(Double d)
               throws ExecException
Overrides:
getNext in class PhysicalOperator
Throws:
ExecException

getNext

public Result getNext(Float f)
               throws ExecException
Overrides:
getNext in class PhysicalOperator
Throws:
ExecException

getNext

public Result getNext(String str)
               throws ExecException
Overrides:
getNext in class PhysicalOperator
Throws:
ExecException

getNext

public Result getNext(Tuple t)
               throws ExecException
Overrides:
getNext in class PhysicalOperator
Throws:
ExecException

getNext

public Result getNext(DataBag bag)
               throws ExecException
Overrides:
getNext in class ExpressionOperator
Throws:
ExecException

getNext

public Result getNext(Map m)
               throws ExecException
Overrides:
getNext in class PhysicalOperator
Throws:
ExecException

getNext

public Result getNext(DataByteArray dba)
               throws ExecException
Overrides:
getNext in class PhysicalOperator
Throws:
ExecException

clone

public POCast clone()
             throws CloneNotSupportedException
Description copied from class: ExpressionOperator
Make a deep copy of this operator. This is declared here to make it possible to call clone on ExpressionOperators.

Overrides:
clone in class ExpressionOperator
Throws:
CloneNotSupportedException
See Also:
Do not use the clone method directly. Operators are cloned when logical plans are cloned using {@link LogicalPlanCloner}

getChildExpressions

public List<ExpressionOperator> getChildExpressions()
Get child expression of this expression

Specified by:
getChildExpressions in class ExpressionOperator

setFieldSchema

public void setFieldSchema(ResourceSchema.ResourceFieldSchema s)

getFuncSpec

public FuncSpec getFuncSpec()

illustratorMarkup

public Tuple illustratorMarkup(Object in,
                               Object out,
                               int eqClassIndex)
Description copied from interface: Illustrable
input tuple mark up to be illustrate-able

Parameters:
in - input tuple
out - output tuple before wrapped in ExampleTuple
eqClassIndex - index into equivalence classes in illustrator
Returns:
tuple


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